METHOD OF COMPOSITES PREPARATION ON BASE OF SILICA OXIDE PHOTON CRYSTALS Russian patent published in 2009 - IPC B82B3/00 C30B29/10 G02B1/02 

FIELD: chemistry.

SUBSTANCE: method includes heating of silica oxide photon crystals with modifying agent - crystal phosphor cesium iodide in vacuum at temperature not less than 800°C during not less than 15 hr. Cesium iodide can be activated with different admixtures (Na, Tl, In, CO₃ etc), providing more bright (in comparison with pure CsJ) radioluminescence on the different waves of the visible-light spectrum. Usage of the scintillator - cesium iodide as filler provides good wettability (caused by capillary forces) of silica oxide microspheres with the melted cesium iodide without outer pressure. It allows to obtain optically inverted composite having approximately the same optical contrast (ratio of the refractive indexes relating to microspheres medium and to the medium filling the pores between microspheres) as initial silica oxide has.

EFFECT: obtaining of the end product with high yield.

4 cl, 1 ex, 2 dwg